... Prostaglandin Synthetase Inhibitors from the African Medicinal Plant Ozoroa mucronata Isao KUBO,* Mujo KIM, Keizo NAYA, Sakae KOMATSU, Yoshiro YAMAGIWA, † Kinji OHASHI,† Yoshitaka SAKAMOTO,† Shinji HIRAKAWA,† and Tadao KAMIKAWA*† Division of Entomology and Parasitology, College of Natural Resources, ... We report here the iso- lation of two potent PG-synthetase inhibitors from the root of the East African ...